Can I have a different site at the bare domain of my multi-domain?

Hi all
I have a network at domain.com and have successfully configured domain2.com as a second domain.
I would like to have a separate site at domain2.com, currently that redirects to domain.com.
Is that possible?

[I am able to create a site, and map "www.domain2.com" to that site; but no the bare domain - I could live with that if I need to]